Foldable guard for jointer machines



Jan. 13, 1931. p DE Y E 1,788,663

FOLDABLE GUARD FOR JOINTER MACHIliES Filed April 5, 1950 2 Sheets-Sheet 1 A ttomcy Jan. 13, 1931. E MAY 1,788,663

FOLDAB LE GUARD FOR JOINTER MACHINES Filed April 5, 1930' 2 Sheets-Sheet 2 6 Inventor I7 ///I I {jT/an 2J6 11 7 I By Attorney a iUNITEDfSTATES "noLnAmE GUARD r012. JOINTERL aoriiuns I Applications led April 5,; 1959. s ial'1i5; .a4i,esa l: i A i x invention'relates toa guard for use I conjunction with planing mills, andthe. prim'ary object of this invention 1s toprov de a s foldable guard for covering ther'knives of a 5; ]ointer\ machine to protect the fingers" of; the

operatorfrom the knives. v t

' A further object of the invention is to provide a foldable guard of the character abo've mentioned adapted to be contacted by the 10 folded as to allow the work to pass, and which 1 when the: work-has passed. will spring back into position over the knives. As comprehended by the present inven- 151 requireany manual operation, the guard be-- ing operated through the medium of suitable spring 7 means whereby the, guard will be moved into "anefiective position over the knives afterthework or board to be jointed has passed; i 7

Other objects and advantages of theme vention will become apparent during a study of the following descriptiomtaken in connection with the accompanying drawings,

wherein: 1 l A V Figure-l is'a' top plan view of my improved guard, the samebeing illustrated as used on avconventional type of jointer machine, V

Figure 2 is a side elevational view of the guard showing the same in col-lapsed position. fi a ,Figure 3 is a side elevational View of the guard, the guard being shown in spread posi- Figure ,4 is a fragmentary detail sectional view taken through the guard for more clearly illustrating the hub mechanism of the guard, 7 Figure 5 is a horizontal transverse-sectional'view taken substantially on line'55 of Figure e 7-, v Figure 6 is a detail view taken substantially, on the line 6-.6 of Figure 1. I 5; reference more in detail to the draw Work" whereby the guard may be sufficiently tion, the guard as before intimated'willnot blade 11the intermediate-blade. The blades ings, it will be" eaten! have entail Tia;

plan: View .a, conventional type" of z j ointe'n machine designated generally by ;the;. refer ence character M, which machine among othervparts comprises-the usual worktable 5 the worktreating knives, and the work guide'6 ,z; ,i j r- I :,.The guard icompjrehended by the present invention comprises a, Vertically-disposed I 55" shaft 7 ,"the lower end of whichis suitably mounted 'in' a. bracket 8 on one side of the vtableffias clearly suggestedinfliligure1'; Flhe; g s shaft is'held within the bracket Sthrough; v

the medium of 'a-set screw 9.

The guard proper includes a 'pimiit oi, a

blades, preferably three, the blades being,

designated by the reference characters 10, 11 and112 respectively. Each of the blades is'substantially identical, in formation, being preferably made}o f -metal and .ofelongated triangular configuration;

The blades are dlsposed one upon other, the blade 12 :being'lowermost blade,f f the blade 10, the uppermost blade and the are of the configuration shown to advantage in Figure 1 andj 'at its :innermostarcuate edge,the lowermost blade 12 is provided with an arcuate: flange 13 corresponding in contour'to theedgef'contour of said blade 12.

The hub "for" the guard is designated generally by" the reference character H. This s V hub, H"comprises a plurality of sections one for Teach of the blades, the ,lowermo st blade 12 at its apex or, smallest end beingforrnedintegrally with the relatively large hub sec; tionll.v f ,1

i The intermediate blade 11 atits smallest end formed integral with the intermediate 1 hub section 15, and the uppermost blade 10,] at its smallestendform'ed integral with the upper'end of section 16. Each of the hub. sections is providecli with a central opening I for receiving theupper' end of the shaft, .7,

and arranged within the, opening of the re spective hubs is a suitable'annual bearing 17 as shown to advantage in Figure 4.

For retaining the'hub of the guard on the 7 upper end of the shaft 7 thereiis threaded endof said hub section 14.

' anchored in the .wall of the It will be noted thatfthe I and 11 respectively are formed on the'upper end of their respective hub sections, the hubs. therefor suitably spacingthe blades with re-' on-the uppermost endof the shaft a pair of lock nuts '18 and 19 respectively, while the lower end of the hub section ltrests on 1 a suitable disk 20 keyedto the shaft 7 through the medium of a suitable set screw 21, the disk 20 forming a closure cap for the lower Arranged within the hub ,section'l land convoluted about the shaft 7 is a coil spring 22, one end of which is anchored in the disk 20 as at 23, and the other end of which is hub section 1 1 as'at24.' 1 t H 1 guard blades, 10

spect to one anotherito permit freedom of movement of the blades. j g V Integral with and extending diagonally across the blade 12 at the free end thereof is an inverted 'U-shaped member 25, the leg of the member at the'corner of the blade 12engageable in a notch 26' formed in the.

v upper corner of the intermediate blade 11 at the free end of'said blade.

' A similar member 27 is likewise formed integral with and extends diagonally across the blade 11 adjacent the free end thereof,

and has one leg thereof receivable in a notch 28 in the upper corner of the blade 10 at the free end of said blade.

Thus it will be seen that the members 25 an'd'27 respectively act as aninterlocking.

of the lowermost blade 12, thus striking the flange 13 of said blade and moving thehlade inwardly or' to the left in Figure 1, thus sli'ghtlycontracting the guard against the ac tion of the spring 22- whereby the work is free to continue its direction of movement.

When the work moves out of contact with the flange 13 under action ofthe spring 22 the blade 12 will he again swung outwardly thus spreading the blades of the guard whereupon the guard will be suitably extended for;

again covering the knives-of the jointer thus protecting the fingers of the operator from the knives and at the same time requiring no" effort on the part of the operator for It will be further noted that the top nut or cap 19 is provided with'a laterallyextending stop Sfwhileth hub 16 of the guard blade 10 is provided with a vertically dis-.

posed stop S for abutting engagement with the stop S. Thus it will be seen that the stops S and S cooperate to prevent the guard from folding in the wrong direction, this being apparent when it is considered .that the blade will swing over toward the right of Figure 1 when the guard is in an unfolded position,

with the result that the outer end of the ointerknives would be left uncovered, however the blade lOis prevented from so swinging toward the rightthrough the medium of its stop 'S contacting with the stop S as isapparent from a study of Figures 1 and 2.

It is thoughtjthat'from the foregoing description, taken in connection with the accompanying drawings a clear understanding of the'operation, utility and advantages; of this invention will be had bythose skilled in the art without a more detailed description'. 7 i

Even though I scribed the preferred embodiment of my in-- v'entiomit is to be understood that the same is susceptible to changes fully comprehended by the spirit of the invention as herein described, and the scope of theappended claims. Having thus described my invention, what I claim as new is:

- 1. A. guard for jointer machines comprising in combination a shaft, means for vertically adjusting the shaft on the machine, a hub rotatably mounted on said shaft and including a plurality of independent sections, adisc keyed to the shaft for supporting said hub on the shaft, a spring convoluted about said shaft internally of one of said hub sections and having oneend thereof engaging said onehub section and the other end thereof engaging said disc, a blade carried by each of said hub sections, one of said blades provided with a flange adapted to contact the other of said blades for rotating the blades opposite to the action of said spring, a stop supported on said shaft, a stop on a second of said hub sections co-acting with the first mentioned stop to limit swinging movement of said second hub section under action of said spring. I V

2. A guard for the cutter members of a jointer machine, said guard comprising a rotatably mounted hub, said hub including a plurality of independent sections, means normally rotating one of said sections'in one direction, a blade carried by each of-said sec tions, said blades being arranged relative to one another and adaptedto be opened and closed fanwise above said cutter, said blades provided with cooperating means whereby have herein shown and deupon move nient'o f the first mentioned huh I 1 section, said blades will transmit movement I from one blade to the other for swinging V.

' said bladesfin one direction, aflangej on one of said blades'adapted to contact with the remaining blades upon swinging movement ofsaid oneblade 1n anopposite direction x for simultaneously swinging all of s aid blades ina, corresponding direction. V In testimonyrwhereof I aflix mysignature. IVAN P; DE MAY. 

